Machine for roughing shoe parts



Nov. 10, 1942. H. LYON MACHINE FOR ROUGHING SHOE PAR' IS Filed April 4, 1940 2 Sheets-Sheet l Nov. 10, 1942. H. LYON 2,301,300

MACHINE FOR ROUGHING SHOE PARTS Filed April 4. 1940 2 Sheets-Sheet 2 I. it :2: 96 f 311/ e 1/8 My 102 -Si 7a E 5 ca 0 415m". P W as Patented Nov. 10, 1942 MACHINE FOR ROUGHING SHOE PARTS Harry Lyon, Plaist'ow, N. H., assignor to United Shoe Machinery Corporation, Borough ofFlemington, N. J a corporationof New Jersey Application April 4, 1940, SerialNo. 327,857

9 Claims.

This invention relates to machines for roughing shoe parts and is herein illustrated and described as embodied'in a machine for roughing the margins of soles to prepare'the soles for the reception of cement by which they are to be subsequently attached to shoes. Certain features of the invention, however, may be employed to advantage in machines for roughing shoe parts other than soles.

In roughing shoe parts having beveled margins, particularly if the bevel is irregular or is different in degree at different locations, and the latter is nearly always true of outsoles, there always exists a problem in the production of a uniformly roughed surface. Heretofore, attempts have been made to overcome the difiiculty by tilting or bending the sole in an effort to present its surf-ace flat to the action of a rigid roughing tool; or a wire brush has been employed as a roughing tool which was sufiiciently' flexible to accommodate itself to irregularities or changes in the bevel of the surface to be roughed. Of the two, the wire brush produces better results upon a leather sole but it has the drawback that it is diflicult, if not impossible, to limit definitely and accurately the boundaries of the roughed area, as is often necessary in the case of outsoles when it is desired to leave a very narrow unroughened stripe adjacent to the edge of the sole.

It is an object of the present invention to provide an improved roughing machine which may employ a rigid roughing tool but which will not require that the sole be distorted or tilted in order to permit it to be presented properly to the action of the tool.

To this end, an important feature of the invention resides in the combination with a work support of a rigid roughing tool which is selfadaptable to various angles of the surface of the work upon said support. Iv prefer to use a reciprocating tool which is tiltably mounted above the work support and is pressed into engagement with the surface of the work upon the support.

Another feature of the invention consists in an organization comprising a. sole support and a roughing tool which is reciprocable across the margin of a sole upon the support. In the illustrated machine, there is a multipointed scratching tool which is reciprocated across the margin of the sole while the sole is fed. continuously past the tool, with the result that a zig-zag pattern consisting of a network of scratches is produced within boundaries definitely determined by the limits of movement of the tool and the path in which the sole is moved.

These and other features of the invention will be better understood and appreciated from reading the following detailed description of a practical embodiment thereof in connection with the accompanying drawings, in which Journaled' in stationary bearings 22, 24. shaft 20 also has fixed to it a worm gear 26 with Fig. 1' is a view of the machine in side elevation;

Fig. 2 is a plan view;

Fig. 3 shows the tool actuating mechanism upon an enlarged scale Fig. 4 shows a detail of the means for pressing work supporting table aflixed to the upper end of a vertical shaft. I'Z which is rotatable in a stationary standard M. A gear [6 secured to the'l'ower end of the shaft l2 meshes with a gear it which. is secured. to a horizontal shaft 20 The which meshes a. worm 28 upon the lower end of an upright shaft 30' having on its upper end a pulley 32 driven by a belt 34 passing over idler pulleys 36', 38. Thus, power supplied by the belt 34 will "cause the shaft 30. and the table Ii] to rotate continuously, the direction of rotation being indicated by an arrow in Fig; 6.

(Jo-operating with the. work support It is. a feed wheel 40 mounted on the front end of a shaft 42, on the rear end of which is secured a worm gear44. meshing with a worm 4'6 upon the shaft 30. Thus, the continuous rotation of the shaft 3|1' causes continuous movement of the feed wheel 40 in timed relation to that ofthe work supporting table Ill, the. parts being so proportioned that the peripheral speed of the feed wheel is the same as the surface speed of that zone of the table immediately beneath it.

In order to accommodate work. of different thicknesses between the vertically stationary stable I0 and the feed wheelv 40, the shaft '42 is journaled in a. sleeve 48 carried by an upright block 50. in which is secured a fork 52 supported by pivot screws 54,. 56 engaging a stationary sleeve 58 which surrounds the shaft 30;

this structure, the feed wheel 40 can swing in a vertical are about the axis of the pivot screws By virtue of 54,. 56, the small amount of relative movement between the worm gear 44 and the worm' 46 being readily permitted by sliding of the gear teeth along the threads of the worm. In order to cause the feed wheel 40 to engage the work firmly, the sleeve 48 is pressed down by a spring 60 mounted in a stationary holder 62' with provision at 64 foradjustment of the tension of the spring; 7

The illustrated roughing tool 66 is really a multi-pointed scratching tool and may consist of a flat steel blade in which are milled parallel V grooves 68, as shown in Fig. 5, the back face being beveledas shown at 19 in Fig. 4 to form a row of alined points 12 which may be repeatedly sharpened by merely grinding the beveled face 10. The tool is clamped upon one end of a supporting arm 14 of substantial length, the other end of the arm being supported for universal movement in a fixed bearing 16 supported by a stationary bracket 18. This supporting means permits the tool to tilt transversely of the margin of a sole guided by a stationary edge gage 80 (see Fig. 6) as the sole is fed overth'e work support H3. The scratching points 12 of the tool are pressed into the work by a tapered presser 82, the point of which bears in a groove 84 in the top of the arm M. A compression spring 86 surrounding the shank of the presser 82 keeps the latter tensioned downward and, because of the rocking movement of the arm 14 permitted by a very loose fit of the tapered'presser 82 in the groove 84, maintains the row of points 12 in engagement with the surface of the work regardless of the angular relation of that surface to the upper face of the work support I0.

The tool 66 is so positioned that the row of points 12 is disposed diagonally to the sole edge and the tool is reciprocated approximately normally to the sole edge by an eccentric 88 (Fig. 2) upon a shaft 90 rotated continuously by a belt 92 which drives a pulley 94 afiixed to the shaft. The eccentric 88 is surrounded by an eccentric strap 96 connected, by a link 98 containing a turnbuckle I00, to a fork 102 which embraces a block I04 and is pivotally connected to said block at I06. The upper end of the block [M is bifurcated and has pivoted therein at B8 a member I IS in which is secured a connecting element H2 attached to or integral with the arm 14. A depending stem H4. rigid with the block Hi4 passes loosely enough through a stationary bearing H6 to permit the block HM to oscillate slightly as the eccentric link 98 reciprocates, thus imparting short, rapid, reciprocatory movements to the tool 66. The shank portion of the presser 82 is very loosely mounted in a stationary support H8 in order that it mayv swing sideways easily and follow the rapid transverse oscillations of the arm 'M.'

By references to the diagrammatic showing in Fig. 6, it may be seen that the combined effect of the feeding movement of a sole S over the work supporting table l and the reciprocating movement of the roughing tool transversely to the sole' edge is to produce a network I20 of scratches in the marginal portion of the sole as illustrated in. Fig. 6. Inasmuch as the throw of the eccentric 88 is constant, the width of the roughened band will be constant but the position of the band relative to the edge of the sole to adapt itself automatically to various angles of the surface of the work upon said support when pressed into engagement therewith, means for driving the tool, and means for pressing the tool into engagement with the surface of said work.

, tool above said support, means for reciprocating said tool crosswise of the margin of a sole upon the support, and means for continuously feeding the sole longitudinally of its edge beneath said tool to produce a zigzag roughing pattern upon the sole margin.

5. In a sole roughing machine, the combination of a sole support, means for feeding a sole over said support, a movable, multipointed scratching tool, means for reciprocating said tool crosswise ,of the margin of a sole upon the support, and "means for feeding the sole margin beneath said tool to produce a network roughing pattern thereon.

6. In a sole roughing machine, the combination of a sole support, a reciprocable scratching tool having a row of alined points adapted to engage the margin of a sole upon the support, and means for feeding the sole beneath said tool and reciprocating the tool to produce a network of scratches upon the sole.

'7. In a sole roughing machine, the combination of a sole support, means for feeding a sole longitudinally over said support, a scratching tool having a row of alined points disposed diagonally to the sole edge, and means for reciprocating said tool approximately normally to the sole edge with the points in engagement with the surface of the sole margin during the sole feeding movement whereby the combined feeding movement of the sole and reciprocating movement of the tool will 'cause a network of scratches to be produced upon can be changed by lengthening or shortening the link 98 by means of the turnbuckle I09. Lengthening the link will position the roughening band farther inward from the sole edge, and vice versa. It is thus a simple matter to provide an unroughened .stripe I22- of any desired width adjacent to the sole edge. 7

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

' 1. In a machine for roughing shoe parts, the combination of a work support, a rigid roughing tool, a mounting for said tool constructed and arranged to permit the tool to tilt freely and the sole margin.

8. In a sole roughing machine, the combination of a sole support, means for feeding a sole over said support, a fixed edge gage for determining the path of movement of the sole, a reciprocable roughing tool arranged to engage the surface of the sole margin, means for reciprocating the tool transversely of said margin, and means for adjustably Varying the limits of reciprocating movement of the, tool to cause it. to operate to the edge of the sole or not, as desired.

9. In asole roughing machine, the combination of a sole support, a tiltably mounted roughing tool above said support, said tool being secured to one end of a'supporting arm of substantial length and the other end of the arm being supported for universal movement in a fixed bearing, and a spring-tensioned presser engaging the arm near the tool and acting to press thetool downward into engagement with a sole upon the support.

' HARRY LYON, 

